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    <title>第三章 绘制和变换三角形</title>
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    <li><a href="01/index.html">01 - 绘制多个点</a></li>
    <li><a href="02/index.html">02 - 绘制三角形</a></li>
    <li><a href="03/index.html">03 - 绘制线：LINES</a></li>
    <li><a href="04/index.html">04 - 绘制拆线：LINES_STRIP</a></li>
    <li><a href="05/index.html">05 - 绘制回线：LINES_LOOP</a></li>
    <li><a href="06/index.html">06 - </a></li>
    <li><a href="07/index.html">07 - </a></li>
    <li><a href="08/index.html">08 - </a></li>
    <li><a href="09/index.html">09 - </a></li>
    <li><a href="10/index.html">10 - </a></li>
    <li><a href="11/index.html">11 - </a></li>
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